Boiler.



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W. A. HENRY.

BOILER. APPLICATION FILED APE.29.1908.

Patented Apr. 27, 1909.

2 SHEETS-SHEET 2.

/NI/E/VTOR A UNITED sTATEs PATENT oEErcE.

WILLIAM A. HENRY, OF NORTH ADAMS, MASSACHUSETTS, ASSIGNOR OF ONE-THIRD TO CHARLES II. RICH AND ONE-THIRD TO LAMONT RICH, OF SCHENECTADY, NEW YORK.

BOILER.

T o' all whom it may concern:

Be it known that I, VILLIAM A. HENRY, a citizen of the United States, residing at North Adams, in the county of Berkshire, State of Massachusetts, have invented certain new and useful Improvements in Boilers; and I do hereby declare the following to be a full, clear, and exact description oi the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to low pressure steam boilers such as are employed tor generating steam for heating` purposes, the invention having for its object the provision of such an arrangement of ba'ti'le plates as will present a tortuous or helical smoke lue to insure a maximum absorption of heat from the products of combustion that pass upwardly to the smoke pipe.

A further object of the invention is the provision of means for facilitating' cleaning of the smoke ilue and also the provision of a novel form of grate which will permit of thorough cleaning of the fire.

Other objects and advantages of the invention include the provision of a structure wherein the parts may be easily and quickly assembled and disassembled, and will be understood from the following description.

In the drawings forming a portion of this specification and in which like numerals ot reference indicate similar parts in the several views, Figure l is a sectional perspective view showing a boiler embodying the present invention, Fig. 2 is a perspective view of the boiler with a part of the casing swung to open osition to permit of cleaning oiE the smoke diie, Fig. 3 is a perspective view showing one section of the lire boX, Fig. 4 is a detail perspective view showing one of the baille plate sections, and, Fig. 5 is a detail view showing the means for holding the casing sections together.

Referring now to the drawings, the present structure comprises a base in the form of an ash-box 10 having the usual door opening l1 in its front provided with a hinged closure l2 and above which is an opening 13 through which projects the shaker bar 14, the opening 13 having a closure l5 which is hinged at its upper edge, and midway ot' the ends of the lower edge of which is a notch 16 which when the closure lis in closed position receives the shaker bar let and holds the latter Specification of Letters Patent.

Application led April 29, 1908.

Patented-Alim 27, 1909.

Serial No. 430,001.

against lateral movement. The remaining portion ol the iront of the base 10 is lormed by doors 17 and 17A which may be swung to open or closed position as desired.

Upon the base l0 is disposed a top plate 1S having a central opening 19 at theedge oi which rises an annular ilange 2t), the upper portion oi which is reduced in thickness as shown at 21 whereby there is produced a shoulder 22 at the base and at the outer side ol the portion 2]. Upon the shoulder 22 is disposed a hollow cross sectionally rectangular ring 23 in which are formed at intervals the inwardly tapered perfor-ations Upon the ring 23 is disposed the lire-box wall which is cylindrical in shape and is made up of segmental sections 25each oi which is smooth on its outer lace and is ribbed on its inner face as clearly illustrated in Fig. 3, each section 25 having at one vertical edge a ilange or lip 2G that overlaps the next section so as to cover the slight interspace between the sections. Each of the sections 25 is hollow and from the bottom oll each section projects a tapered nipple 27 commonly known as a push nipple which tits snugly into the corresponding perforation 24 to make a water-tight joint. ',lwo of the sections 25 have a door opening 2S therein which is provided with the usual hinged closure 29, the door opening being formed through the adjacent end portions of said sections. Above the 'lire-box are a series of segmental baille plates each of which is a quadrant, as illustrated, and all of which plates are hollow. rlhese baille plates are shown at 30 and at the center of curvature of each platev is what may be termed a rounded hub 31 which is hollow and communicatcs with the body ol the plate, the

hub ol" each plate having an inwardly tapered perforation 32 at the center oi its bottom and a tapered push nipple 33 at the center olt its upper i'aee and through which communication is had with the upper portion ol" the hub. rl`he segmental sections are disposed with their hubs superimposed, the nipples of the hubs engaging tightly in the perforations of the hubs thereabove and the nipples and perfor-ations et the several sections successively increasing in diameter from the bottom section upward. The lower-most hub rests u on a hollow column Sil having a push nipp e 35 at its upper end which fits the perforation 32 in saidwhub.

IOO

rlhe lower end of the column 34 has a tapered perforation 36 that receives the tapered plug 37 at the upper end of a post 38 that rises from the Vbottom of the ash-pit, this tapered plug being in eiiect a push nipple.

A steam dome is provided and comprises a narrowed cylindrical lower portion 38 and an upper hood portion 39 which projects beyond the wall of the portion 38 as illustrated, the portion 38, havingV a tapered perY foration 40 in its bott-om which receives the push nipple 33 ofthe uppermost segmenthub. rlo hold the push nipples snugly in the perforations and thus insure water-tight and steam-tight joints, a vbolt 4l is passed upwardly through the post 38, the column 34 and through the perforations and nipples of the hubs 3l and through the top of the hood 39 of the steam dome, the bolt serving to draw the parts together.

The lowermost baffle plate rests directly with its flat bottom face upon the corresponding wall sections 25 while the succeeding three plates or segmental sections have each a depending hollow flange 42 which rests upon the corresponding portion of the tire-box wall, the heightof the flange of the second plate being equal to the height of the 'Erst plate so that the bottom face of the second plate touches the plane of the upper face of the 'lirst plate. The height of the flange of the third plate is equal to the height of the flange of the second plate plus the thickness ot the second plate while the height of the flange of the fourth plate is equal to that of the third plate plus the thickness of the third plate. The plates are disposed witlrtheir adjacent side faces touching the same planes. The remaining plates are without franges and are supported entirely from their hubs. rlhe adjacent side faces of the plates touch the same planes as is the case with the lower four sections, so that there is provided a stepped helical passage between the baille plates and leading from the tire-box to the space surrounding the portion 38 of the steam dome and beneath the hood 39, from which latter portion there leads a collar 43 for attachment of a smoke pipe.

The collar 43 is carried by a section 44 of the boiler jacket which section is connected rigidly to the hood 39 and rests with its lower end upon the radiating battle plate ila-nge 45 where it is held in any suit-able manner. The rigid or 'fixed section 44 in practice, formsfsubstantially a third of the entire jacket and hinged to its vertical edges are lthe jacket sections 46 and 47 which are adapted to swing into and out of position between the baffle plate flange 45 and the hood flange 48. The sections 46 and 47 are provided at their free vertical edges with pivoted grooved pulleys over which is laced a chain 49 having weights 50 at its ends for holding it taut. By this means, the'hinged sections are held securely in closed positions. T he grooved pulleys are shown at 5l and are mounted on spindles 52. This arrangement permits of exposure of the helical flue so that it may be readily cleaned, it being understood that the flue is designed to carry the products of combustion from the lire-box to the smoke pipe collar. j Y

It is of course understood that in the present construction, there are provided the usual gages and other equipments, the feed of the boiler being through the pipe 66 into the base ring 23 while steam is taken oil' from the dome through a pipe engaged in the opening 57 the circulation being upwardly from the ring 22 through the lire-box wall and through the battle plates to the steam dome.

vW hat is claimed, is

l. A boiler comprising a helical arrangement of superimposed segmental plates, said plates being hollow and intercommunicat ing, Va hollow column upon which the plates are supported and with which the lowermost plate communicates, a hollow iire-boX surrounding the post and communicating with the lowermost plates and a jacket inclosing the plates.

2. A boiler comprising a helical series of superimposed hollow baille plates communieating at the axis of the helix, a steam dome communicating with, the uppermost `ba'flle plate upon which it rests, a supporting column for the lowermost baffle plate, and

Vmeans passed through the column, the dome and the communicating portions of the baffle plates and for holding said members together.

3. A boiler comprising a hollow base ring, a wall including hollow sections disposed upon the ring, a helical series of superimposed hollow baifle plates, the lowermost baffle plates resting upon andcommunicating with the hollow wall sections, and a jacket inclosing the plates.

4. A boiler comprising a hollow base ring, a wall including hollowV sections disposed upon the ring, a helical series of superimposed hollow baffle plates, the lower-most baffle plates resting upon and communicating with the hollow wall sections, and a jacket inclosing the plates, the battle plates next 'above the hollow wall with the exception of the lowermost baffle plate having depending hollow flanges resting upon Ythe wall Vand through which flanges communication bee tween the wall and the plates is obtained.

ln testimony whereof, l aflix my signature, in presence of two witnesses.

VILLIAM A. HENRY lllitnesses Y Gno D. CLEVELAND, `W1LLIAM D; BEER. 

